How to make sure that the Configure Call Integration Pulls API Data?

I pulled the data from Big Query's data source using the HTTP Get Method

it works

I was able to translate the data to Appian's format


Data is displaying

Now the next step I need to do is be able to push this data to BigQuery, I already know that the method needs to change to post with some kind of request. My question here is,what type of information would need to go into the JSON side to send the updated data through?



Along with the Appian Modeler Processor, I have set up the configure call integration, I have used the HTTP Get Method as my Selected Integration.



I have my data inputs



Now with the Expression editor, would this be the Data side of things, Will I be able to set the variables for the data in there and make it in such a way that every time bigQuery data updates a sepcic data it will update into Appian.

Can I do the same thing with pushing the data too, have the POST Method set up with a process Modeler to push data that has been updated in Appian to BigQuery?